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  1. J

    VY LS1 Air Con Fault

    Yeah nice, I brought a GM evap sensor for $7 new from a holden store, i will test this out and see how it goes first, if this fails i will look at a whole new system. My car only has 120,000km so hasnt been abused much. I will let you know how it all goes :-)
  2. J

    VY LS1 Air Con Fault

    Here is the internal one :-) Just got to pull the dash apart to get it out, it is making more sense that this sensor is playing up, I took the car for a spin today and used the auto climate feature. It blew heated air into my face, when i had the car set at 20 deg. So if this sensor is reading...
  3. J

    VY LS1 Air Con Fault

    Yeah, apparently on the Scanner tool it is coming up with the sensor reading -31 degrees (hence why my A/C is not working - hopefully) I found an image using the workshop manual and it has a sensor attached to the evaporator via a plastic clip. You can buy the sensors on Fleebay. I will pop...
  4. J

    VY LS1 Air Con Fault

    Thanks Fu, I will give it a clean, see if that works, I looked through that thread, your crewman is looking nice with all the work you are putting into it. I did find a workshop manual tonight it shows there is an evaporator sensor attached to that via a plastic clip inside the HVAC. So I need...
  5. J

    VY LS1 Air Con Fault

    Single zone climate controlled :)
  6. J

    VY LS1 Air Con Fault

    Thanks Fu,
  7. J

    VY LS1 Air Con Fault

    So, I took the car in to have a scan tool run over it (moving into summer and getting hot again lol). The evaporator sensor is reading -31 degrees, so it is thought that this is stopping the A/C Compressor from kicking in. Looks like I will be removing the dash to find the internal evaporator...
  8. J

    VT A/C problems Maybe due to custom tune???

    Did you figure this out yet? I am just on hold, waiting to find the answer
  9. J

    VY LS1 Air Con Fault

    Just a quick query here, I am still having issues (I don’t think it is the diodes). I tested the volts from the ac pressure switch. I think I have some leakage with the wiring? So I tested this: Battery earth to reference signal = 5.1v Engine block earth to reference signal = 5v Pressure switch...
  10. J

    VY LS1 Air Con Fault

    So, Now the ac is not working haha. This is killing me and mugging me off. Tested or the power to the compressor and now there is none (unless I jump the relay). Some from all your help and running different tests, appears that for some reason the relay is not getting the earth signal to...
  11. J

    VY LS1 Air Con Fault

    Trevor, I pulled out the BCM and PCM - plugged it all back in. The ac now works. I did the power testing as you suggested here and the ac is getting power. If the AC diodes are on the way out, would the system work on and off? what’s the best way to test the diodes?
  12. J

    VY LS1 Air Con Fault

    put on the back burner a bit. Too hot here in qld to sit in the shed. I am going to replace the bcm and have the pcm reflashed (performance). when I get around to that I will let you guys know how I go. i swapped around the pressure switches and made no difference.
  13. J

    VY LS1 Air Con Fault

    Thanks team for your input, i am going to look at the pressure switch and wiring. See if this is faulting somewhere in the wiring, on a random side note, I took the car for a good drive 900km round trip. The A/C worked the whole trip. Got home, washed the car parked it in the garage. Went for...
  14. J

    VT A/C problems Maybe due to custom tune???

    Nutcracker, I stumbled across this thread, I have the same problem with my VY LS1, what was your solution for this?
  15. J

    VY LS1 Air Con Fault

    I reset the pcm using the instructions on this forum and the ac worked again during the idle learn. But than decided to go back to its old habits of not working after. Anyone got any thoughts.
  16. J

    VY LS1 Air Con Fault

    So, just an update, I ended up taking the car to an ac mob, nothing wrong with the pressure or mechanically. Diagnosed down to the compressor not receiving an earth signal. So maybe a BCM/PCM issue?. Anyone had these issues?
  17. J

    VY LS1 Air Con Fault

    Thanks Team, i will take it to another aircon mob. Interesting, i started the car yesterday and the A/C ran until i turned the vehicle off (about 5-10min), i got excited and went for a longer drive and the aircon didnt kick in. The compressor would start, but quickly shut off. I will post in...
  18. J

    VY LS1 Air Con Fault

    Yeah, big fans kicked in when we bypassed the A/C relay. The gas was put in using proper A/C re-gas gear, not a DIY Can
  19. J

    VY LS1 Air Con Fault

    Thanks, Do you need a specific scan tool? I plugged Mechpro code reader, but that doesn't really tell me much, only shows codes, to which i had none.
  20. J

    VY LS1 Air Con Fault

    Team, I have spent an hour looking on here but have not found what I am looking for. So, my A/C compressor on my LS1 is not kicking in at the moment. I just had it re-gassed after replacing a valve that pooped. So i tried some diagnostic testing and figured it may be an electrical problem...
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